Shannon Luminous Materials

Among the customers who've managed to find it, Shannon Luminous Materials Inc. has an envious track record of closing sales. A hands-off approach to advertising and marketing hasn't dissuaded companies such as Disneyland, yellow-pages publisher R.R. Donnelley and fishing-lure maker Luhr-Jenson since engineer Richard F. Cruce bought the company 15 years ago. It has put a damper on growth, though.